PLC5 maximum of four timers acc strategy.

[gromit 4]

I have four timers used in my PLC5 program and want to capture the highest accumulated value of the four, much like the processor maximum scan time, where I can manually reset it.
Is there a simple ladder logic scheme that can accomplish this with the PLC5 instruction set?
Thanks.

[Mickey 71]

Sort (SRT) instruction will do that for you.

Or sample ladder

 

See pdf(s)

sort.pdf

HIVALUE.pdf

Edited 20 Nov 2019 by Mickey

[gromit 4]

Thanks Mickey...
I couldn't figure out how to make the SRT--(Sort) instruction work.
Please see the attached logic that works perfectly.

MAX_ACC_DDS.pdf

[Mickey 71]

What works is most important. And easy enough to understand.

[panic mode 246]

assume first timer is the greatest. then compare if next timer is greater, something like this:

MOV T4[1].PRE N7:0 ; assuming timer 1 ipreset is greatest, greatest value is in N7:0

GRT T4[2].PRE N7:0 MOV T4[2[.PRE N7:0 ; check if next one is greater than current maximum

GRT T4[3].PRE N7:0 MOV T4[3[.PRE N7:0 ; check if next one is greater than current maximum

GRT T4[4].PRE N7:0 MOV T4[4[.PRE N7:0 ; check if next one is greater than current maximum